package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;

import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpStatus;

import org.springframework.lang.NonNull;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * jwt令牌校验的拦截器
 */
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Resource
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request  请求对象
     * @param response 响应对象
     * @param handler  处理器（Controller方法对象）
     * @return 是否成功
     */
    @Override
    public boolean preHandle(@NonNull HttpServletRequest request, @NonNull HttpServletResponse response, @NonNull Object handler) {
        if (!(handler instanceof HandlerMethod)) return true;
        String token = request.getHeader(jwtProperties.getUserTokenName());
        try {
            log.info("jwt校验==> {}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            log.info("当前用户id==> {}", userId);
            BaseContext.setCurrentId(userId);
            return true;
        } catch (Exception ex) {
            response.setStatus(HttpStatus.SC_UNAUTHORIZED);
            return false;
        }
    }
}
